Protector mechanism for looms



April 29, 1930. R. G. TURNER 1,756,610

PROTECTOR MECHANISM FOR LOOMS Filed April 6, 192a H [Tar/19's Patented Apr. 29, 1930 STATES PAre orricr.

RICHARD G. TURNER, E WORCES ER, MASSACHUSETTS, AssIeNoR To CRCMPTCN &"

KNOWLES LooM WCRKS, or WORCESTER, MASSACHUSETTS, a CORPORATION or.

MASSACHUSETTS PROTECTOR MECHANISM FORLO'OMS Application filed April c, 1928. Serial No. 267,970.

This invention relates to improvements in protector mechanism for looms and it is the general object of the invention to provide simple mechanism effective to relieve pressure of the protector finger against the binder at the time of picking.

" The usual form of protector mechanism embodies and mounted on the lay and having daggers: and also protector fingers which move in fixed angular relation against the action of a torsion spring acting to hold the daggers in knock-off position. The spring exerts its .force against the binder which corresponds to the active shuttle or the shuttle about'to be picked. I find that the protector finger exerts a pressure which in the average run of loomsis slightly greater than that eX- erted' by 'the binder spring. The shuttle is picked from its box when the lay is moving '20 backwardly and in order to relieve pressure of the fingers I provide a friction control for the protector rod operative to hold the protector finger away from the binder during the backward stroke of the lay;

' --It is' necessary, of course, to have the protector finger in engagement with the binder corresponding to the active shuttle when the latter is entering the box in order to protect the warpsagainst smashes, but the shuttle is ordinarily boxed on the forward stroke of the lay; and because of this-fact I am able to move the dagger into loom stopping position and'the finger against theiproper binder at some time prior to the time alloted for the boxing of the shuttle.

*It isa more particular object of my invention to provide a sliding friction device which relieves protector finger pressure at the "time of picking but restores the protector finger to its proper protecting function when the shuttle is being boxed without the use of the ordinary protector spring. -I find as a matter of practical convenience that it is desirable to'dispose the friction element in a' downwardly inclined direction so as to reduce the actual sliding movement of the respective parts of the element and at the same time to prevent the device from projecting into the aisles between'rows of looms.

'50 With these and other objects which will "ward stroke of. the lay as the latter apappear as the description proceeds,- my invention resides in the combinationand arrangement of parts hereinafter described and set forth in the claims. V I V In the accompanying drawings wherein one form of my invention is shown, Fig. 1 is an end elevation of a portion of a loom having my invention applied thereto, the shuttle boxes being in section,

Fig. 2ris afront elevation taken in the 'directionof arrow 2, Fig. 1 and Fig. 3' is an enlarged section on line 3?? of Fig. 1. .l a Referring to the drawings, I provide the usual loom frame10,.breast beam 11 and lay 12 mounted on lay swords one of which is indicated at 13 in Fig. 1, The usual crank connectors-14 move the lay back and forth toward the breast beam so that the boxes l5 for the shuttles s, Swing toward and from the front of the loom. Each box is provided with a binder 16 effective to check themovement ofthej shuttle ;and that binder which is in active position or corresponds to the active shuttle cooperates with a protector finger 17 secured to aprotector rod 18 which is pivota'lly mounted in a bracket 19 secured to thelay12. v

By means of mechanism not set forth herein but clearly understood the shuttle will be propelled across the loom by a motion which starts when the lay has reached its-mid position on the backward stroke thereof moving to the left as viewed in Fig. 1. On the forproaches the breast beam 11 a dagger 20 which is secured to the protector rod 18 will be positioned to cooperate with knock-off mechanism indicated generally at 21. I have illustrated no particular form of knockoff mechanism inasmuch as these devices are well understood and it is sufiicient for the purposes of my present invention to state that whenthe dagger is in raised position it will cooperate with the knock-off mechanism 21 on the forward stroke of the lay if the shuttle is not properly boxed. If the shuttle be properly boxed, however, the protector finger will he moved in a clockwise direction as viewed in Fig. 1 to lower the dagger 21 so that as the lay moves forwardly said dagger will clear the knock-ofi mechanism 21 to permit continued running of the loom.

My invention is equally applicable to looms having single shuttle boxes at each end, but I have chosen to illustrate the same in connectionwith a drop box loom to set forth the fact that the same may be employed on the more complex styles of looms. The matter thus far described is of common construction and except for the particular form of finger 17 and the manner of acting on the protector rod 18 forms no part of my present invention. V V

In carryingmyimprovements into efiect I provide a sliding friction member or bar which is pivotally connected as at 31 to the protector finger 17 and pass said member 30 through afrietion element 32 shown more particularly in Fig. 3. Said element includes a body 33 having a recess 34 in which is located a leather pad 35. The upper portion of said recess receives and guides a part of the member or bar 30, while the other surface of said bar engages and is restrlcted 1n its'movement by a friction pad 36 In order to'hold saidpad 36 against the bar 30 I provide compression springs 37 which surround studs 38 threaded or otherwise secured in the b0dy33 as at 39. WVashers 40 retained by cotter pins 41 limit upward movement of the springs and require the latter to bar 30.

Because of the swinging movements of the lay it isnecessary to provide somemeans for permitting the bar 30 and the friction element 32 to assume varying angular positions and this I accomplish by pivotally mount press the pad 36 against the ing said element 32 as at 42 on a fixed part of the loom frame. As shown in Fig. 1 the element 32 is located below and in front of the lay so as to cause a downward movement on the part of the friction bar 30. The protector rod 18 may have adjustably secured thereon a collar 43 having a rearwa'rdly extending finger 44 which passes under and engages the lay 12 to limit movement of the protector rod and parts secured thereto in a clockwise direction as viewed in Fig. l.

n In operation, as the lay swings rearwardly the pad 36 restricts movement of the bar 30, the result of whichis to tend to draw the finger 17 forwardly to the dotted line position shown in Fig. 1. The extent of this 7 movement is l mited by the finger 44 and said movement begins immediatel Y upon the backward movement of the lay after the same has beaten in the previously laid pick of filling. It is apparent, therefore, that at the time of picking the finger 17 is moved to such a position that it exerts no pressure on the binder 16 corresponding to the active shuttle. Later in the same cycle of the pick the lay reverses its movement and moves forwardly toward the breast beam 11; whereupon the bar 30, because of the location of the pivot 31 and the resistanie to movement of said bar by the pads 35 and 36, presses the protector finger 17 against the binder 16. As previously stated, it is during the-forward movement of the lay that the shuttle is boxed,'and it will therefore be seen that the bar 30 is effective to cause proper action on the part of the protector finger and dagger, and in fact to require these parts to act as they normally do when the usual spring is employed in connecion with the detector rod 18.

From the foregoing it will be seen that I have provided a very simple and effective friction device which operateswithout the aid of springs and relieves the pressure of the binder finger at the'time of picking without sacrificing the proper operation of the protector mechanism on the forward motion of the lay. It will further beseen that by disposing the friction element 32 below the point of pivotal connection between the detector finger and the bar 30 Iefiectively reduce the amount of sliding movement between the pad 36 and said bar 30. Vhile Ihaveshown thepivotal mounting for the element 32 below and in front of the protector rod, yet I believe it is within the scope of my invention to place said pivotal mounting in such a position as will provide the desired amount of sliding movement with respect to the bar 30 and the element '32, so long as the friction devices are operative to cause or require correct movements on the part of the detector finger. I 1

Having thus described my invention it .will be seen that changes and modifications may be made therein by those skilled in the art' ited to the details herein disclosed, but'what I claim is: i V 1. In a friction device for a protector mechanisms of a loom having a lay which moves backwardly and forwardly and having a protector rod which is movable to stopping and non-stopping position,-'a guide, a bar pivotally connected to the finger'at one end and the other end extending through said'guide, said guide being angularly movable and having frictional elements between which the bar is slidable while the lay is moving either backwardly or forwardl r 2. In a protector mechanism for a loom having a lay and binders moving backwardly and forwardly and having a finger thereon to engage the. binders, a bar pivotally connected to the fingerat one end, a guide for the other end of said bar having frictional elements, said guide having side walls defining a recess through which the other end of the bar extends and is frictionally engaged by the elements, one of said elements being held in the recess of the guide and engaging one side of the bar and the other element being carried by the guide to engage the other side of said bar, said guide and elements mounted for angular movement around a pivot therefor.

3. In a protector mechanism for a loom having a lay and a protector finger held thereto, a bar having operative engagement with said finger at one end, a device mounted for bodily angular movement, said device comprising an element having side walls defining a recess in which the other end of the bar slides and said device carrying therewith a pair of frictional elements, one of said elements held in the recess and engaging one side of the bar and the other element mounted on the device and engaging the other side of the bar, resilient means tending to move one of the frictional elements toward the other, said bar passing between the frictional elements and held in contact therewith by resilient means carried by the device.

In testimony whereof I have'hereunto affixed my signature.

RICHARD G. TURNER. 

